Diet Intervention Spirometry and Tobacco

Design: Multicenter randomized controlled trial in primary care. Sample: We will recruit 80 smokers from 35 to 70 years without history of lung disease. Subjects will be randomly assigned to control or intervention group (1:1).

Study variables: We measure socio-demographic, clinical, anthropometry and spirometry data. Food consumption will be evaluated by a semi-quantitative food frequency questionnaire (FFQ), energy expenditure in physical activity by the Minnesota Leisure Time Activity questionnaire and adherence to Mediterranean Diet by a 14-item questionnaire.

Intervention: Nutritional intervention conducted by a dietitian who designs a nutrition program to enhance the traditional Mediterranean diet pattern using new technology as an educational tool in primary care: DIET blog. Participants will be referred to a single annual visit and one group session per year for two years.

Analysis: All analyses will be based on intention-to-treat. The results will be considered clinically relevant when it detects a difference in lung function (decreased FEV1) >10-12 ml/year. A p-value of <0.05 will defined statistical significance.

Inclusion criteria

• Being active smokers at the time of enrollment with an cumulative consumption more than 10 packs / year
• Having Internet access and regular use of new technologies in general or have help for it.
• Having participated in the first phase of the project: RESET study (PI11/01962).

Exclusion criteria

• Any evidence of previous diagnosis of respiratory disease,
• Suffering from a terminal or chronic disorder that alters the baseline parameters or hinder the completion of testing and required test during the study period,
• Inability to track for any reason,
• Express refusal of the patient to continue in the study